[PATCH 02/10] serial: 8250_dw: support DMA on the OF case

[Emilio López]

Currently, DMA properties on the DT are ignored when using the 8250_dw
driver. With this patch, DMA will be used when available.

Signed-off-by: Emilio López <emilio at elopez.com.ar>
---
 drivers/tty/serial/8250/8250_dw.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index ed31135..f75c0bf 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -222,6 +222,8 @@ static int dw8250_probe_of(struct uart_port *p,
 			   struct dw8250_data *data)
 {
 	struct device_node	*np = p->dev->of_node;
+	struct uart_8250_port	*up = container_of(p, struct uart_8250_port,
+						   port);
 	u32			val;
 	bool has_ucv = true;
 
@@ -254,11 +256,14 @@ static int dw8250_probe_of(struct uart_port *p,
 		}
 	}
 	if (has_ucv)
-		dw8250_setup_port(container_of(p, struct uart_8250_port, port));
+		dw8250_setup_port(up);
 
 	if (!of_property_read_u32(np, "reg-shift", &val))
 		p->regshift = val;
 
+	if (of_get_property(np, "dmas", NULL))
+		up->dma = &data->dma;
+
 	/* clock got configured through clk api, all done */
 	if (p->uartclk)
 		return 0;
-- 
2.0.0